Modelling of transportation costs for alternative LifeOfMine plans of continuous surface lignite mines


 Samson Booth
 2 years ago
 Views:
Transcription
1 GOSPODARKA SUROWCAMI MINERALNYMI Tom Zeszyt 4/3 WITOLD KAWALEC* Modelling of transportation costs for alternative LifeOfMine plans of continuous surface lignite mines Introduction Geological modelling and mine design and scheduling have successfully adopted sophisticated computer methods not only for a comfortable digital replacement of a traditional paper documentation but also for their powerful data processing capabilities with the extensive use of methods that were simply not available before. While any 3D visualisation of geological data and mine developments (including enhanced surface rendering and the virtual reality tools) are of great value for both mining engineers and the public, the most important and highly specialised software tools have been developed for the purpose of mine optimisation. The opencast mining projects are now often based on the economic optimisation algorithms, dealing with the milestones of a project: ultimate pit design, pushbacks generation and lifeofmine plan. In general, the mine optimisation algorithms depend on the economic block model of a deposit a set of cells each assigned with its mining cost and in case of an ore block calculated revenue from selling the contained ore. The accuracy of the input data an economic model is crucial for any further processing and no result can be more reliable than the input data. Therefore the construction of the economic block model deserves a thorough data preparation, analysis and validation otherwise applying the advanced pit optimisation algorithms like ultimate pit design (Lerchs, Grossmann 1965; Underwood, Tolwiñski 1998) is pointless. The possible errors of a model depend on the geological modelling that has generated the quality block model, the proper assessment of the revenue from selling the contained ore (based on stock exchange data or * Institute of Mining Engineering, Wroclaw University of Technology, Wroc³aw, Poland.
2 126 other price formula) and often the most difficult the accuracy of spatial distribution of mining costs. The pit optimisation algorithms have been developed mostly for cyclical open cast operations, therefore the analysis of a truck haulage system has been implemented for accurate mining costs modelling. However, this is not suitable for continuous surface mining operations with a belt transportation system which reflects the localisation of waste dumping (external or inpit) and the method of pit advancing (parallel or circular). For a given continuous surface mine, once the ultimate pit shell and the annual output have been fixed, the choice of an initial cut position together with the dump location and the resulting belt conveying arrangement have the biggest impact on mining costs. These have not been modelled yet for the purpose of pit optimisation algorithms therefore this paper deals with modelling the spatial distribution of mining costs with regard to alternative belt conveying costs. 1. Methods of local adjustment of mining costs Pit optimisation algorithms have been developed mostly for ore mines with steep slope angle and relatively large depth. In such mines the increasing of pit depth is limited by rising costs of overburden removal and haulage. The size of surface mines with continuous mining operations (characterised usually by shallow slope angle and smaller depth) is more often constrained by costs of acquiring the land and costs of overburden removal and dumping. So, their mining cost distribution is subjected to different rules. Methods of mining costs adjustment (available in NPV Scheduler) Metody regulowania kosztów wydobycia (dostêpne w NPV Scheduler) TABLE 1 TABELA 1 Mining cost factor Unit Description averaged mining cost per mass or volume unit (AMC) Cost Adjustment Factor (CAF) as a function of depth CAF assigned to rock type Optional cost of acquiring the terrain Individual CAF computed for each cell [PLN/t] or [PLN/m 3 ] [dimensionless] [dimensionless] [PLN] [dimensionless] default value assigned to a cell if no CAF has been set CAF proportional to depth; suitable for truck haulage and dewatering rising costs Independent from the above; represents different costs of exploitation (e.g. blasting versus cutting) Cost assigned to a given perimeter on the terrain surface rather than to cells; represents costs of purchasing land for mining activities Allows to distinguish changes of mining costs precisely with regard to any given criteria
3 127 Pit optimisation software (e.g. NPV Scheduler) allows a mining engineer to adjust mining costs (see table 1) with the use of so called Cost Adjustment Factor (CAF) which multiplies the average mining cost (AMC) to obtain the final mining cost (MC) that can be even individual for each cell in the economic block model. There are several reasons for adjusting the MC (as described in Table 1) but the only specific one for continuous surface mining operations the distribution of belt conveyor transportation costs can be done with the use individual CAF. The proposed solution is described below. 2. The idea of modelling the distribution of belt conveying costs 2.1. General assumptions Following domestic (Bednarczyk 2007) and foreign (Petrich 2003) publications the belt conveyors share some 20% of the total investments and 40% of the total energy consumption of a lignite mine with continuous surface mining operations. The forecasted structure of mining costs for the planned Legnica continuous surface lignite mine repeats the 18% share of all mining costs for belt conveying (including some 5.5% of energy consumption). As almost 20% of total mining costs is distributed unequally over the pit which should have an impact on the overall spatial distribution of mining costs, which changes the cash flow over the mine life. In order to identify the actual cost of transportation of a given cell in an economic block model it should be assigned with its own energy consumed by conveyors for delivering coal or overburden either to the final transfer point or to the dumping site (external or inpit), respectively. Both only horizontal (inpit dumping) and inclined transportation routes should be considered, therefore the energy required for horizontal transportation and for vertical transportation should be identified separately. The formula (1) contains all necessary factors for calculating the specific energy consumption factor (JKOP). JKOP(, x y, z,) ( JE L(, x y, z,) JE (, x y, z,)) C u [PLN/m 3 ] (1) H v E E where: JE H specific energy consumption factor horizontal transportation [KWh/(m 3 m)], JE V specific energy consumption factor vertical transportation [KWh/(m 3 m)], L(x,y,z) horizontal length of a conveyor route from a point (x,y,z) [m], H(x,y,z) height of rising of a conveyor route from a point (x,y,z) to the surface [m], C E average electric energy price [PLN/KWh]; let C E = 0.16 z³/kwh, u E multiplier of energy costs [dimensionless]; let u E =3,2.
4 128 The specific energy consumption factor is identified per volume unit rather than mass unit in order to maintain the compatibility with volume units used by mines for overburden removal data. The factors should be individual for coal and overburden (in fact they can be individually calculated with regard to different rock type density). Assuming that transportation costs are the only costs that distinguish blocks with one another, the CAF transp can be calculated as a ratio (2) (Table 1): CAF transp ( AMC 082. JKOP ) AMC [PLN/m 3 ] (2) 2.2. Identification of specific energy consumption of belt conveyors The specific energy consumption of belt conveyors should be calculated for given types of conveyors that are planned for the pit. The specialised software for computations belt conveyors resistance to motion and their required drive power is necessary to give the exact data. Assuming typical parameters of belt conveyors used in medium size lignite surface mines (belt width 1.8 m, belt speed 5.24 m/s, belt type St3150, idlers spacing: 1.2 and 6.0 m for top and bottom strand respectively, double pulley head drive, averaged ambient temperature 5 C and typical operating conditions, the specific energy consumption factors have been calculated 1 as shown in Table 2. TABLE 2 Specific energy consumption by belt conveyors TABELA 2 Zu ycie energii rozporz¹dzalnej wed³ug przenoœników Specific energy consumption factor Unit Overburden Coal JE H horizontal transportation [kwh/(m 3 m)] 0, , JE V vertical transportation [kwh/(m 3 m)] 6, , Modelling the length of belt conveyor routes The exact identification of a transportation route is possible after the detailed mine design for each stage of a mine life. However, even at the stage of a prefeasibility study it can be assessed on the basis of an ultimate pit outline and assumed variant of pit advance and waste dumping site (Fig. 1). 1 Calculations have been done with the use of the QNKTT software (Kawalec, Kulinowski 2007).
5 129 Fig. 1. Generalised schemes of overburden (white arrows) and coal (grey arrows) transportation routes on an ultimate pit outline background; circles denote transportation ramps; from left to right: parallel pit advancing (external and inpit waste dumping), circular pit advancing (external and inpit waste dumping) Rys. 1. Ogólne schematy nadk³adu (strza³ki bia³e) i wêgla (strza³ki szare) tras transportu na planie koñcowego obrysu odkrywki; ko³a symbolizuj¹ rampy transportowe; od lewej do prawej: równoleg³e poszerzanie odkrywki (sk³adowanie odpadów zewnêtrzne i w odkrywce), poszerzanie odkrywki po kole (sk³adowanie odpadów zewnêtrzne i w odkrywce) For the preliminary assessment of transportation costs the following items should be set: type of advancing, positioning of an initial cut, transportation ramp location, range of external dumping for waste blocks (from the initial cut, beyond this range an inpit dumping supersedes the external dumping). In the case of circular pit advance the horizontal distance of the transportation route can be calculated with the use of Euclides distance (3) while for the parallel pit advance the taxi distance (4) is appropriate. 2 2 dist ( A, B ) ( A B ) ( A B ) (3) E x x y y distt ( A, B ) Ax Bx A y B y (4) where: A x,a y,b x,b y are the plane coordinates of points A, B. Some supplementary assumptions for identification of the transportation route from the ramp to the external dumping site should be set in accordance to the general mine design guidelines Description of the procedure The multistep procedure of creating the ultimate pit together with its Optimal Extraction Sequence (OES) the sequence of mining blocks in an ultimate pit that delivers the highest NPV for a given economic model and general slope angles necessary for further
6 130 Fig. 2. Box and arrows positions and roles in a typical IDEF0 scheme Rys. 2. Po³o enia i role prostok¹tów i strza³ek w typowym schemacie IDEF0 Fig. 3. The scheme of ultimate pit generation with regard to alrenative transportation costs Rys. 3. Schemat tworzenia odkrywki ostatecznej w odniesieniu do alternatywnych kosztów transportu optimisation mine planning has been described below (Fig. 3) with the use of IDEF0 scheme (Fig. 2). Next steps of generating the LifeofMine plan are standard for the Tolwinski s longterm optimisation algorithm available in the NPV Scheduler software (Jurdziak, Kawalec 2000): pushbacks generation (with regard to assumed pit advancing method), scheduling upon the given pushbacks scenario. These steps are presented in the following case study. 3. Case study The case study of a LifeOfMine plan with regard to alternative transportation costs has been done for a small lignite deposit Morzyczyn of the opencast lignite mine Konin in
7 central Poland. Due to geological documentation the deposit contains some 9.2 million tonnes of mineable reserves, average thickness of lignite seam is 5.7 m and of overburden is 48 m. The lignite seam is split with interlayers. The coal quality parameters are below the power plant requirements: a) Calorific value: avg. Q R i = 7000 kj/kg (required minimum: 7800 or 8300 kj/kg). b) Sulphur content: avg. S R = 0,94% ((allowed maximum: 0,96%). c) Ash content: avg. A R = 18% ((allowed maximum: 12%). High stripping ratio as well as the close neighbourhood of the protected landscape are the strong arguments against the exploitation of this deposit. However it can be used for the study. The orebody modeling has been done in the Datamine Studio geological, mining software. The structural wireframe models of the terrain, top and bottom lignite seam surfaces and waste interlayer zones have been interpreted from the raw drillhole data. Then the structural block model has been built with the cells sizes of m. The model contains three main zones: coal, overburden and interlayers. Due to relatively low density of drillhole grid ( m over the area of some 30 km 2 ) interpolation of quality parameters has been done with the use the simplest nearest neighbour method. The total tonnage of the rocks within the coal zone has reached 85 million tonnes (regardless of actual coal seam thickness, stripping ratio and quality parameters). The average values of the calorific value, ash and sulphur content were very similar to those from geological documentation. For the economic model the base price 2 of coal has been set to PLN/Mg, the base mining cost (AMC) to 5,25 PLN/cum (upon the analysis of mining costs in the Konin mine). 131 Fig. 4. The visualisation of the entry ultimate pit shell (Lerch sgrossmann algorithm, NVP Scheduler) Rys. 4. Wizualizacja wejœcia ostatecznego otoczenia odkrywki (algorytm LerchaGrossmanna, NVP Scheduler) 2 Based on coal quality parameters (calorific value, ash and sulphur content) price formula has been used.
8 132 This economic model has been used for generation of the ultimate pit with the use of Lerch sgrossmann algorithm. The average slope angle has been set to 15, the annual lignite output to 2 million tonnes and the discount rate to 10%. The generated entry ultimate pit contains 19.6 million tonnes of coal (avg. calorific value 7720 kcal/kg, avg. ash content 16.5% and avg. sulphur content 0.85%) and 113 million m 3 of overburden. The shape of the pit shell is presented below. On the basis of the optimised ultimate pit analysis, including the location of its phases nested ultimate pits generated for a series of discounted base lignite price (Jurdziak, Kawalec 2000), the alternative circular and parallel pit advancing have been proposed for evaluation (Fig. 5). The transportation costs have been then calculated and embedded into the modified economic block model as an additional CAF field to be utilised by the NPV Scheduler software. For these costs calculations the range of external dumping and the common length of the conveyor route from the transportation ramp to the dumping site have been assumed. Fig. 5. The schemes of positioning the initial cut (grey rectangular), transportation ramp (white ring) and the direction of pit advancing: circular clockwise (left) and parallel (right) Rys. 5. Schematy pozycjonowania wrêbu pocz¹tkowego (szary prostok¹t), rampy transportowej (bia³y pierœcieñ) i kierunek poszerzania odkrywki: ko³owym zgodnie z kierunkiem ruchu wskazówek zegara (z lewej) i równoleg³y (z prawej) The two ultimate pits based on two, alternative CAFs have been then generated exactly within the entry ultimate pit shell (no new pit optimisation). Though the ultimate pit (and the lignite reserves) is then common, the consecutive phases are different both in terms of size (phases 7 9 on Fig. 6) and expected profit (Fig. 7). Two sets of alternative pushbacks series have been generated within digitised boundaries of their global limits: trapezes rotated clockwise around the point of transportation ramp from the initial cut boundary for the circular pit advancing, rectangles parallel with each other moved to the north from the initial cut boundary for the parallel pit advancing compare Figure 5). These pushbacks control the sequencing of mined blocks that follows the geometrical constraints of continuous surface mining operations. The differences between size (Fig. 8), shape and value of pushbacks (Fig. 9) alternative scenarios are much bigger then of phases,
9 133 Fig. 6. Coal reserves (Mg) and overburden volume (m 3 ) of cumulated ultimate pit phases generated for two mining Cost Adjustment Factors (1 denotes circular advancing, 2 denotes parallel advancing) Rys. 6. Rezerwy wêgla (Mg) i objêtoœæ nadk³adu (m 3 ) skumulowanych ostatecznych faz odkrywki generowane dla dwóch Czynników Regulacji Kosztów Wydobycia (1 dla poszerzania ko³owego, 2 dla poszerzania równoleg³ego) Fig. 7. Cash flow and top assessment of the NPV of cumulated phases of the ultimate pit generated for two mining Cost Adjustment Factors (1 denotes circular advancing, 2 denotes parallel advancing) Rys. 7. Przep³yw pieniê ny i najlepsza ocena NPV skumulowanych ostatecznych faz odkrywki generowanych dla dwóch Czynników Regulacji Kosztów Wydobycia (1 dla poszerzania ko³owego, 2 dla poszerzania równoleg³ego)
10 134 Fig. 8. Coal reserves (Mg) and overburden volume (m 3 ) of cumulated pushbacks generated for two alternative mining scenario (1 denotes circular advancing, 2 denotes parallel advancing) Rys. 8. Rezerwy wêgla (Mg) i objêtoœæ nadk³adu (m 3 ) materia³ów skumulowanych generowane dla dwóch alternatywnych scenariuszy wydobycia (1 dla poszerzania ko³owego, 2 dla poszerzania równoleg³ego) Fig. 9. Cash flow and NPV of cumulated pushbacks generated for two alternative mining scenario (1 denotes circular advancing, 2 denotes parallel advancing) Rys. 9. Przep³yw pieniê ny i najlepsza ocena NPV materia³ów skumulowanych generowanych dla dwóch alternatywnych scenariuszy wydobycia (1 dla poszerzania ko³owego, 2 dla poszerzania równoleg³ego)
11 generated regardless on any mining constraints but the pit slope angle. The NPV of the last cumulated pushback is some 25% lower than the top assessment made for ultimate pit (Figures 7 and 9). 135 Fig. 10. Mining cost (MCOST) and annual profit throughout the mine life for two alternative mining scenarios (1 circular advancing, 2 parallel advancing) Rys. 10. Koszty wydobycia (MCOST) i zysk roczny przez ca³y czas u ytkowania kopalni dla dwóch alternatywnych scenariuszy wydobycia (1 dla poszerzania ko³owego, 2 dla poszerzania równoleg³ego) Fig. 11. Cash flow (cumulated) and NPV of the mine throughout its life for two alternative mining scenarios (1 circular advancing, 2 parallel advancing) Rys. 11. Przep³yw pieniê ny (skumulowany) i NPV kopalni przez ca³y czas jej u ytkowania dla dwóch alternatywnych scenariuszy wydobycia (1 dla poszerzania ko³owego, 2 dla poszerzania równoleg³ego)
12 136 Fig. 12. Strip ratio and averaged calorific value of lignite throughout the lifeofmine for two alternative mining scenarios (1 circular advancing, 2 parallel advancing); note: no data for period 0 (prestripping), strip ratio for period 1 omitted (prestripping continued) Rys. 12. Szybkoœæ wykonywania odkrywki i uœredniona wartoœæ kaloryczna lignitu przez ca³y czas u ytkowania kopalni dla dwóch alternatywnych scenariuszy wydobycia (1 dla poszerzania ko³owego, 2 dla poszerzania równoleg³ego); uwaga: brak danych dla okresu 0 (przed rozpoczêciem odkrywki), szybkoœæ wykonywania odkrywki dla okresu 1 pominiêta (ci¹g dalszy przed rozpoczêciem odkrywki) The LifeOfMine plans have been generated for both scenarios with the same settings: target: stripping ratio (target: 5.8, bounds: from 4.5 to 6.5, relaxed for first 3 years), lignite output: 2 million tonnes, maintained for years 4 11, with 3 beginning years for opening the pit (temporary output limited to 10, 50 and 70% of the target value, respectively) and one year for closing mining operations, the prestripping period allowed (year labelled 0 on charts) the development of the initial cut before any coal is reached. Each plan has been based on its own mining costs distribution (CAF) and sequence of pushbacks. As expected, the 1 st scenario provides higher cumulated cash flow and NPV than the 2 nd one due to lower transportation costs. The comparison of the results of two alternative longterm mine plans provides valuable data for a mine planner for further studies before the optimal mining solution can be found. Conclusions and remarks The presented method of modelling belt conveyor transportation costs for alternative mining scenarios allows to build more accurate economic block model of deposits that are planned to be mined with the use of continuous surface operations. This economic block model is suitable for the generation and analysis of the ultimate pit and after creating the
13 137 appropriate set of pushbacks for building and investigation alternative LifeofMine plans. The method seems to be a suitable supplement to the general purpose pit optimisation software which has not been adjusted for continuous surface mining requirements that are less flexible than those of cyclical mining. The original data for the presented case study have been used upon the permission of the Konin lignite mine. The obtained results are illustrative only. The computations have been made with the use of the Datamine Studio and NPV Scheduler mining software licensed for the Wroclaw University of Technology by Datamine Corporation. REFERENCES [1] Announcing the Standard for Integration Definition For Function Modeling (IDEF0), 1993, Draft Federal Information, Processing Standards Publication 183, 1993 December 21. [2] B e d n a r c z y k J., 2007 Scenarios of development of a lignite deposit Legnica. In Technology of development of a lignite deposit Legnica. Editor: Górnictwo odkrywkowe, Wroc³aw, 2007 (in Polish). [3] J u r d z i a k L., K a w a l e c W., 2000 Optimisation of the pit based on the price of lignite and quality requirements for the Szczerców deposit. VII Conference Proc.: The Exploitation of Mineral Resources, Zakopane 2000 (in Polish). [4] K a w a l e c W., K u l i n o w s k i P., 2007 Computations of belt conveyors. Transport Przemyslowy 1(27), 2007 (in Polish). [5] L e r c h s H., G r o s s m a n n I.F., 1965 Optimum Design and Open Pit Mines. Transactions, C.I.M. Vol. LXVIII, str , [6] P e t r i c h F., 2003 Optimisation of mining technology in the Lusatian mining area. Surface Mining Braunkohle, Other Minerals. 55(2003) No. 2. [7] U n d e r w o o d R., T o l w i ñ s k i B., 1998 A mathematical programming viewpoint for solving the ultimate pit problem. European Journal of Operational Research, 107 (1998) MODELOWANIE KOSZTÓW TRANSPORTU W PLANACH ALTERNATYWNEGO U YTKOWANIA KOPALNI DLA KOPALNI LIGNITU O POWIERZCHNI CI G EJ S³owa kluczowe Z³o e lignitu, kopalnia odkrywkowa, analiza finansowa Streszczenie Analiza finansowa planu u ytkowania kopalni w przypadku zoptymalizowanej odkrywki zale y od dok³adnoœci modelu ekonomicznego z³o a. Formu³a cenowa lignitu wynika z jego parametrów jakoœciowych i analizy rynku energii, ale koszty górnicze zale ¹ od systemu wydobycia. Gdy ustalone zostan¹ ostateczna wielkoœæ odkrywki i roczny uzysk, alternatywna rozbudowa odkrywki z odpowiednim systemem transportu mog¹ generowaæ ró ne lokalnie koszty górnicze. Przedstawiono modelowanie rozk³adu tych kosztów w modelu bloku ekonomicznego z³o a lignitu i ich wp³yw na przep³ywy pieniê ne kopalni w czasie jej u ytkowania.
14 138 MODELLING OF TRANSPORTATION COSTS FOR ALTERNATIVE LIFEOFMINE PLANS OF CONTINUOUS SURFACE LIGNITE MINES Lignite deposit, open pit, financial analysis Key words Abstract The financial analysis of a LifeOfMine plan of an optimised open pit depends on accuracy of its deposit economic model. The price formula of lignite can be built of its quality parameters and energy market analysis but mining costs depend on a mining system. Once the ultimate pit size and its annual output are set the alternative pit advancing with suitable conveying system can generate locally various mining costs. Modelling the distribution of these costs in an economic block model of a lignite deposit and their influence on mine s cash flow over its lifetime have been presented.
Theoretical consideration in establishing the parameters of longwall panel
GOSPODARKA SUROWCAMI MINERALNYMI Tom 24 2008 Zeszyt 4/2 MAREK JASZCZUK*, JAN KANIA* Theoretical consideration in establishing the parameters of longwall panel Introduction So far the level of mining production
More information3D Modelling & Mine Planning Software. Comprehensive tools provide a competitive advantage from exploration to rehabilitation.
3D Modelling & Mine Planning Software Comprehensive tools provide a competitive advantage from exploration to rehabilitation. Maptek Vulcan, the world s premier 3D mining software solution, allows users
More informationTable 1: Kitsault Mineral Resource Estimate (David Thomas P. Geo., Effective Date 17 April 2012)
1.0 SUMMARY The effective date of the mineral resource estimate is 17 April 2011, which represents the cutoff date for the most recent scientific and technical information used in the resource estimate.
More informationSIMULATION OF EXTRACTION RATE AND SCHEDULING BASED ON GEOLOGICAL AND QUALITY MODELS AS A METHOD OF MINE PLANNING IN MODERN MINING
Górnictwo i Geoin ynieria Rok 29 Zeszyt 3/2 2005 Krzysztof Olszówka, Filip Orzechowski * SIMULATION OF EXTRACTION RATE AND SCHEDULING BASED ON GEOLOGICAL AND QUALITY MODELS AS A METHOD OF MINE PLANNING
More informationBENEFITS OF USING MOBILE CRUSHING AND SCREENING PLANTS IN QUARRYING CRUSHED STONE. 1. Introduction. Mario Klanfar*, Darko Vrkljan*
AGH Journal of Mining and Geoengineering vol. 36 No. 3 2012 Mario Klanfar*, Darko Vrkljan* BENEFITS OF USING MOBILE CRUSHING AND SCREENING PLANTS IN QUARRYING CRUSHED STONE 1. Introduction Mobile crushers
More informationImportant Terms of Underground Mining Some Examples for Underground Mining Important Terms of Surface Mining Some Examples for Surface Mining
Important Terms of Underground Mining Some Examples for Underground Mining Important Terms of Surface Mining Some Examples for Surface Mining Mining Terms Types of Mining Types of Mining Surface Mining:
More informationTHE LEADING MINE SCHEDULING SOLUTION
THE LEADING MINE SCHEDULING SOLUTION XPAC XPAC: Scheduling software that is truly life of mine. XPAC is a business focused mine scheduling application, designed specifically for reserve modelling, production
More informationEconomical modeling for identification of best drilling choice in sublevel stoping
GOSPODARKA SUROWCAMI MINERALNYMI Tom 24 2008 Zeszyt 4/2 K. ORAEE*, A.H. BANGIAN**, A. PARHIZKAR*** Economical modeling for identification of best drilling choice in sublevel stoping Introduction Basically
More informationEVALUATING THE LACK OF FLEXIBILITY AGAINST THE BENEFITS OF INPIT CRUSHING AND CONVEYING
EVALUATING THE LACK OF FLEXIBILITY AGAINST THE BENEFITS OF INPIT CRUSHING AND CONVEYING Optimizing Mine Operations Conference Toronto 2013 Date Bob McCarthy Snowden Outline Introduction IPCC basics Mine
More informationDragline or Truck/Shovel? Some Technical and Business Considerations
UNSW/Mitsubishi Lecture24 Page 1 UNSW Inaugural UNSW/Mitsubishi Lecture School of Mining Engineering MITSUBISHI DEVELOPMENT PTY LTD DRAGLINE AND/OR TRUCK / SHOVEL ASSIST: SOME TECHNICAL AND BUSINESS CONSIDERATIONS
More informationAccounting for stripping costs in the production phase costs of waste removal and the associated benefit
IFRIC Meeting Agenda reference 2A Staff Paper Date March 2010 Project Topic xtractive Activities Accounting for stripping costs in the production phase costs of waste removal and the associated benefit
More informationInPit Crushing and Conveying Phil Morriss
InPit Crushing and Conveying Phil Morriss AGENDA 1. Introduction  what is InPit Crushing and Conveying (IPCC)? 2. What does a quarry need from IPCC? 3. Why and when should we consider using it? 4. How
More informationLUSATIAN LIGNITE MODERN, COMPETITIVE AND SUSTAINABLE LIGNITE MINING. 1. Introduction and summary. Wolfgang Ketzmer*
Górnictwo i Geoinżynieria Rok 31 Zeszyt 2 2007 Wolfgang Ketzmer* LUSATIAN LIGNITE MODERN, COMPETITIVE AND SUSTAINABLE LIGNITE MINING 1. Introduction and summary Since May 2004, Vattenfall Europe Mining
More informationMultimineral cutoff grade optimization by grid search
Multimineral cutoff grade optimization by grid search by E. Cetin* and P.A. Dowd Synopsis Orebodies that contain more than one economically important mineral are generally evaluated by parametric cutoff
More informationSection 25 Quadratic Equations and Inequalities
5 Quadratic Equations and Inequalities 5 a bi 6. (a bi)(c di) 6. c di 63. Show that i k, k a natural number. 6. Show that i k i, k a natural number. 65. Show that i and i are square roots of 3 i. 66.
More informationCopyright 2011 Casa Software Ltd. www.casaxps.com. Centre of Mass
Centre of Mass A central theme in mathematical modelling is that of reducing complex problems to simpler, and hopefully, equivalent problems for which mathematical analysis is possible. The concept of
More informationREVISED GCSE Scheme of Work Mathematics Higher Unit T3. For First Teaching September 2010 For First Examination Summer 2011
REVISED GCSE Scheme of Work Mathematics Higher Unit T3 For First Teaching September 2010 For First Examination Summer 2011 Version 1: 28 April 10 Version 1: 28 April 10 Unit T3 Unit T3 This is a working
More informationCoal. Confidence of Coal Resources Estimation
Polish Academy of Sciences Mineral and Energy Economy Research Institute Cracow, Poland Confidence of Coal Resources Estimation Estimating RiskAdjusted Discount Rate for Hard Coal Projects Depending on
More informationGreater Nanticoke Area School District Math Standards: Grade 6
Greater Nanticoke Area School District Math Standards: Grade 6 Standard 2.1 Numbers, Number Systems and Number Relationships CS2.1.8A. Represent and use numbers in equivalent forms 43. Recognize place
More informationCoal preparation technology in Poland
GOSPODARKA SUROWCAMI MINERALNYMI Tom 22 2006 Zeszyt 4 WIES AW S. BLASCHKE*, LIDIA GAWLIK**, STANIS AW A. BLASCHKE*** Coal preparation technology in Poland Key words Coal preparation plant, steam coal,
More informationFuzzy logicbased approach to building damage risk assessment considering the social and economic value
GOSPODARKA SUROWCAMI MINERALNYMI Tom 24 2008 Zeszyt 3/1 AGNIESZKA MALINOWSKA* Fuzzy logicbased approach to building damage risk assessment considering the social and economic value Introduction The underground
More informationGeometry and Measurement
The student will be able to: Geometry and Measurement 1. Demonstrate an understanding of the principles of geometry and measurement and operations using measurements Use the US system of measurement for
More informationDetermination of the most favourable parameters of coal concentrates allowing optimal utilisation of chemical energy of coal
Determination of the most favourable parameters of coal concentrates allowing optimal utilisation of chemical energy of coal Zofia Blaschke 1, Wieslaw Blaschke 2, Stanislaw Blaschke 3 1 Polish Mineral
More informationYear 6 Maths Objectives
Year 6 Maths Objectives Place Value COUNTING COMPARING NUMBERS IDENTIFYING, REPRESENTING & ESTIMATING NUMBERS READING & WRITING NUMBERS UNDERSTANDING PLACE VALUE ROUNDING PROBLEM SOLVING use negative numbers
More informationCHAPTER 4 EARTHWORK. Section I. PLANNING OF EARTHWORK OPERATIONS
CHAPTER 4 EARTHWORK Section I. PLANNING OF EARTHWORK OPERATIONS IMPORTANCE In road, railroad, and airfield construction, the movement of large volumes of earth (earthwork) is one of the most important
More informationconveying mining into the future
conveying mining into the future June 2011 Contents Background 3 In Pit Crushing and Conveying 3 Truck and Shovel vs IPCC 4 IPCC crushers and their benefits 5 Fixed 5 SemiFixed 5 Relocatable 5 Movable
More informationDepreciation of fixed assets and efficiency of investment and operation of a mining plant
GOSPODARKA SUROWCAMI MINERALNYMI Tom 23 2007 Zeszyt 4 TADEUSZ FRANIK* Depreciation of fixed assets and efficiency of investment and operation of a mining plant Key words Mining, hard coal mining, depreciation
More informationUSE OF SOLUTION STRATEGY IN OPEN CAST MINING TRUCK DISPATCHING SYSTEM
USE OF SOLUTION STRATEGY IN OPEN CAST MINING TRUCK DISPATCHING SYSTEM Kazem Oraee & Bahareh Asi Azad Univeristy Tehran South, Tehran, Iran Kavoshgaran consulting engineers, Tehran, Iran ABSTRACT: The technique
More informationGemcom Minex and the Corporate Database
*Gemcom Software was acquired by Dassault Systèmes, the 3DEXPERIENCE Company, in July 2012. It is now known as GEOVIA. Gemcom Minex and the Corporate Database Jon Barber  Vice President, Minex,  Gemcom
More informationMATHEMATICS  SCHEMES OF WORK
MATHEMATICS  SCHEMES OF WORK For Children Aged 7 to 12 Mathematics Lessons Structure Time Approx. 90 minutes 1. Remind class of last topic area explored and relate to current topic. 2. Discuss and explore
More informationNatural Neighbour Interpolation
Natural Neighbour Interpolation DThe Natural Neighbour method is a geometric estimation technique that uses natural neighbourhood regions generated around each point in the data set. The method is particularly
More informationOPEN PIT DESIGN AND SCHEDULING  I.T SOLUTION FOR LONGTERM MINE PLANNING
OPEN PIT DESIGN AND SCHEDULING  I.T SOLUTION FOR LONGTERM MINE PLANNING D.L.R. Prasad 1, P. Srinivas 2, B. Sambasivarao 3, *D. Gopinath 4 INTRODUCTION Information Technology has changed the way we live.
More informationCalifornia Common Core State Standards Comparison FOURTH GRADE
1. Make sense of problems and persevere in solving them. 2. Reason abstractly and quantitatively. 3. Construct viable arguments and critique the reasoning of others 4. Model with mathematics. Standards
More informationRFID ENABLED GRADE CONTROL MANAGEMENT SYSTEM
RFID ENABLED GRADE CONTROL MANAGEMENT SYSTEM MINE TRIAL EXECUTIVE REPORT CATEGORY A Project CONTRACT NO. 4605002077 Approval The following Signatories approve this Project Process Report: NAME ROLE SIGNATURE
More informationI Newsletter Q4 WISHING YOU A MERRY CHRISTMAS & A HAPPY NEW YEAR WELCOME TO OUR LAST NEWSLETTER EDITION FOR 2014!
I Newsletter Q4 WISHING YOU A MERRY CHRISTMAS & A HAPPY NEW YEAR WELCOME TO OUR LAST NEWSLETTER EDITION FOR 2014! As we wrap up a busy year with the relaunch of beloved brand Datamine, to releasing our
More informationA new short and mediumterm production scheduling tool MineSight Schedule Optimizer (MSSO)
A new short and mediumterm production scheduling tool MineSight Schedule Optimizer (MSSO) Zhanyou Huang a, Wenlong Cai a, A. Frederick Banfield a a Mintec, Inc., Tucson, Arizona, USA The MineSight Schedule
More informationSolving Simultaneous Equations and Matrices
Solving Simultaneous Equations and Matrices The following represents a systematic investigation for the steps used to solve two simultaneous linear equations in two unknowns. The motivation for considering
More informationIntroduction. The Aims & Objectives of the Mathematical Portion of the IBA Entry Test
Introduction The career world is competitive. The competition and the opportunities in the career world become a serious problem for students if they do not do well in Mathematics, because then they are
More informationSELECTED ASPECTS OF TRANSPORTATION SYSTEM MODELLING
TOTAL LOGISTIC MANAGEMENT No. 1 2008 PP. 15 24 Tomasz AMBROZIAK, Dariusz PYZA SELECTED ASPECTS OF TRANSPORTATION SYSTEM MODELLING Abstract: The paper presents selected aspects of the transport services
More informationNumeracy and mathematics Experiences and outcomes
Numeracy and mathematics Experiences and outcomes My learning in mathematics enables me to: develop a secure understanding of the concepts, principles and processes of mathematics and apply these in different
More informationISiTE  Laser Scanning Revolutionises Site Survey
ISiTE  Laser Scanning Revolutionises Site Survey I.K. Kapageridis Maptek/KRJA Systems Ltd, United Kingdom ABSTRACT: MAPTEK's revolutionary ISiTE 3D Laser Imaging System, presented in this paper, is
More informationNumeracy Targets. I can count at least 20 objects
Targets 1c I can read numbers up to 10 I can count up to 10 objects I can say the number names in order up to 20 I can write at least 4 numbers up to 10. When someone gives me a small number of objects
More informationIn mathematics, there are four attainment targets: using and applying mathematics; number and algebra; shape, space and measures, and handling data.
MATHEMATICS: THE LEVEL DESCRIPTIONS In mathematics, there are four attainment targets: using and applying mathematics; number and algebra; shape, space and measures, and handling data. Attainment target
More informationAlgebra Geometry Glossary. 90 angle
lgebra Geometry Glossary 1) acute angle an angle less than 90 acute angle 90 angle 2) acute triangle a triangle where all angles are less than 90 3) adjacent angles angles that share a common leg Example:
More informationLIGNITE MINING DEVELOPMENT STRATEGY
LIGNITE MINING DEVELOPMENT STRATEGY STATEM ENT OF PRINCIPL E Recognizing that lignite will remain the principal fuel for electricity generation in the long term, the use of indigenous coal is encouraged
More informationLevel 1  Maths Targets TARGETS. With support, I can show my work using objects or pictures 12. I can order numbers to 10 3
Ma Data Hling: Interpreting Processing representing Ma Shape, space measures: position shape Written Mental method s Operations relationship s between them Fractio ns Number s the Ma1 Using Str Levels
More informationWhole Numbers and Integers (44 topics, no due date)
Course Name: PreAlgebra into Algebra Summer Hwk Course Code: GHMKUKPMR9 ALEKS Course: PreAlgebra Instructor: Ms. Rhame Course Dates: Begin: 05/30/2015 End: 12/31/2015 Course Content: 302 topics Whole
More informationTypes of Mining  Expert Table
See page 6 Minerals Downunder Teacher Guide (2002)  Activity 4a Types of Mining  Expert Table How to Jigsaw Information 1. Divide the class into Home Groups of five for the five different types of mining
More information6.1 NUMBER SENSE 3week sequence
Year 6 6.1 NUMBER SENSE 3week sequence Pupils can represent and explain the multiplicative nature of the number system, understanding how to multiply and divide by 10, 100 and 1000. Pupils make appropriate
More informationThe successful integration of 3D seismic into the mining process: Practical examples from Bowen Basin underground coal mines
Geophysics 165 Troy Peters The successful integration of 3D seismic into the mining process: Practical examples from Bowen Basin underground coal mines This paper discusses how mine staff from a number
More informationMath syllabus Kindergarten 1
Math syllabus Kindergarten 1 Number strand: Count forward and backwards to 10 Identify numbers to 10 on a number line Use ordinal numbers first (1 st ) to fifth (5 th ) correctly Recognize and play with
More informationNumber & Place Value. Addition & Subtraction. Digit Value: determine the value of each digit. determine the value of each digit
Number & Place Value Addition & Subtraction UKS2 The principal focus of mathematics teaching in upper key stage 2 is to ensure that pupils extend their understanding of the number system and place value
More informationGlencoe. correlated to SOUTH CAROLINA MATH CURRICULUM STANDARDS GRADE 6 33, 58 84, 87 16, 49
Glencoe correlated to SOUTH CAROLINA MATH CURRICULUM STANDARDS GRADE 6 STANDARDS 68 Number and Operations (NO) Standard I. Understand numbers, ways of representing numbers, relationships among numbers,
More informationascending order decimal denominator descending order Numbers listed from largest to smallest equivalent fraction greater than or equal to SOL 7.
SOL 7.1 ascending order Numbers listed in order from smallest to largest decimal The numbers in the base 10 number system, having one or more places to the right of a decimal point denominator The bottom
More informationTURKEY CREEK PIT OPTIMISATION STUDY ADDS 2 YEARS MINE LIFE TO THE LITTLE EVA PROJECT AT CLONCURRY
10 August 2015 ASX: AOH, FSE: A2O TURKEY CREEK PIT OPTIMISATION STUDY ADDS 2 YEARS MINE LIFE TO THE LITTLE EVA PROJECT AT CLONCURRY Estimated oxide and sulphide resources within the optimum pit is 17.3
More informationFractions Associate a fraction with division to calculate decimal fraction equivalents (e.g ) for a simple fraction (e.g. 3/8).
: Autumn 1 Numeracy Curriculum Objectives Number, Place Value and Rounding Read, write, order and compare numbers up to 10,000,000 and determine the value of each digit. Round any whole number to a required
More informationSuch As Statements, Kindergarten Grade 8
Such As Statements, Kindergarten Grade 8 This document contains the such as statements that were included in the review committees final recommendations for revisions to the mathematics Texas Essential
More informationCutoff Grades and Optimising the Strategic Mine Plan Contents
Cutoff Grades and Optimising the Strategic Mine Plan Contents CHAPTER 1 PART 1 Introduction Introductory comments 1 The evolution of cutoff theory increasing numbers of dimensions 2 Conducting cutoff
More informationExistence of Simple Tours of Imprecise Points
Existence of Simple Tours of Imprecise Points Maarten Löffler Department of Information and Computing Sciences, Utrecht University Technical Report UUCS00700 www.cs.uu.nl ISSN: 097 Existence of Simple
More informationSettlement of Precast Culverts Under High Fills; The Influence of Construction Sequence and Structural Effects of Longitudinal Strains
Settlement of Precast Culverts Under High Fills; The Influence of Construction Sequence and Structural Effects of Longitudinal Strains Doug Jenkins 1, Chris Lawson 2 1 Interactive Design Services, 2 Reinforced
More informationOverview Mathematical Practices Congruence
Overview Mathematical Practices Congruence 1. Make sense of problems and persevere in Experiment with transformations in the plane. solving them. Understand congruence in terms of rigid motions. 2. Reason
More informationCharlesworth School Year Group Maths Targets
Charlesworth School Year Group Maths Targets Year One Maths Target Sheet Key Statement KS1 Maths Targets (Expected) These skills must be secure to move beyond expected. I can compare, describe and solve
More informationAcceleration due to Gravity
Acceleration due to Gravity 1 Object To determine the acceleration due to gravity by different methods. 2 Apparatus Balance, ball bearing, clamps, electric timers, meter stick, paper strips, precision
More informationSUPPLEMENTARY GREEN BOOK GUIDANCE
SUPPLEMENTARY GREEN BOOK GUIDANCE ADJUSTING FOR TAXATION IN PFI vs PSC COMPARISONS 1 INTRODUCTION 1.1 This guidance looks at the differential tax receipts that arise from the use of the Private Finance
More informationInteractive Math Glossary Terms and Definitions
Terms and Definitions Absolute Value the magnitude of a number, or the distance from 0 on a real number line Additive Property of Area the process of finding an the area of a shape by totaling the areas
More informationNEWS RELEASE LEXAM ANNOUNCES POSITIVE PRELIMINARY ECONOMIC ASSESSMENT RESULTS FOR THE OPEN PIT PROJECTS IN TIMMINS
NEWS RELEASE LEXAM ANNOUNCES POSITIVE PRELIMINARY ECONOMIC ASSESSMENT RESULTS FOR THE OPEN PIT PROJECTS IN TIMMINS Project Generates 32% IRR and C$33 Million NPV AfterTax; Cash Costs of US$865 per Ounce
More informationFCAT Math Vocabulary
FCAT Math Vocabulary The terms defined in this glossary pertain to the Sunshine State Standards in mathematics for grades 3 5 and the content assessed on FCAT in mathematics. acute angle an angle that
More informationGPS BASED TRUCK DISPATCH SYSTEM (TDS) IN HIGHLY MECHANIZED BAUXITE MINES A CASE STUDY.
GPS BASED TRUCK DISPATCH SYSTEM (TDS) IN HIGHLY MECHANIZED BAUXITE MINES A CASE STUDY. Dr Ashutosh Roul, PhD Senior Manager(Mines),NALCO. NALCO Asia s largest integrated Aluminium Complex, Encompassing
More informationSavannah North Scoping Study Looking into the future 3 February 2016
Savannah North Scoping Study Looking into the future 3 February 2016 ASX: PAN Disclaimer Cautionary Statements This presentation includes information extracted from Panoramic Resources Limited ASX announcement
More informationVariable components of the Mine Call Factor from a surface mine perspective using AngloGold Ashanti Iduapriem Mine as a case study
Variable components of the Mine Call Factor from a surface mine perspective using AngloGold Ashanti Iduapriem Mine as a case study M.N.M Tetteh 1, F.T Cawood 2 1 School of Mining Engineering, University
More informationAn introduction to surface mining
An introduction to surface mining The wealth of nations A wellaccepted principle is that the wealth of a nation comes from the earth. In the world of mining, a corollary to this is that If it can t be
More informationEFFICIENT METHOD FOR STORAGE OF LONG CONVEYOR BELTS PASSAGES INSIDE THE BULK CONTAINERS
TRANSPORT PROBLEMS 2011 PROBLEMY TRANSPORTU Volume 6 Issue 3 Maria ŁUSZCZKIEWICZPIĄTEK University of Łódź, Faculty of Mathematics and Computer Science Department of Applied Computer Science Banacha St.
More informationHISTOGRAMS, CUMULATIVE FREQUENCY AND BOX PLOTS
Mathematics Revision Guides Histograms, Cumulative Frequency and Box Plots Page 1 of 25 M.K. HOME TUITION Mathematics Revision Guides Level: GCSE Higher Tier HISTOGRAMS, CUMULATIVE FREQUENCY AND BOX PLOTS
More informationCost Benefits analysis
Cost Benefits analysis One of the key items in any business case is an analysis of the costs of a project that includes some consideration of both the cost and the payback (be it in monetary or other terms).
More informationYear 3 End of year expectations
Number and Place Value Count in 4s, 8s, 50s and 100s from any number Read and write numbers up to 1000 in numbers and words Compare and order numbers up to 1000 Recognise the place value of each digit
More informationYear 1 Maths Expectations
Times Tables I can count in 2 s, 5 s and 10 s from zero. Year 1 Maths Expectations Addition I know my number facts to 20. I can add in tens and ones using a structured number line. Subtraction I know all
More informationNEWS RELEASE. Toronto and Swiss Stock Exchanges Symbol IMZ, Frankfurt Symbol MIW
NEWS RELEASE February 11, 2008 Toronto and Swiss Stock Exchanges Symbol IMZ, Frankfurt Symbol MIW INTERNATIONAL MINERALS ANNOUNCES 6.2 MILLION OUNCES OF MEASURED AND INDICATED GOLD RESOURCES AND RESULTS
More informationGeometry FSA Mathematics Practice Test Answer Key
Geometry FSA Mathematics Practice Test Answer Key The purpose of these practice test materials is to orient teachers and students to the types of questions on paperbased FSA tests. By using these materials,
More informationRead and write numbers to at least 1000 in numerals and in words.
Year 1 Year 2 Year 3 Number, place value, rounding, approximation and estimation Count to and across 100, forwards and backwards, beginning with 0 or 1, or from any given number. Count, read and write
More informationGeography 4203 / GIS Modeling. Class 11: Sampling and Core Areas
Geography 4203 / 5203 GIS Modeling Class 11: Sampling and Core Areas Some Updates  Projects! Projects!!! 12 March deadline for data demo, ready for use Make sure you have the data at hand which you intend
More informationThe Circumference Function
2 Geometry You have permission to make copies of this document for your classroom use only. You may not distribute, copy or otherwise reproduce any part of this document or the lessons contained herein
More informationScreening Study of Life Cycle Assessment (LCA) of the Electric Kettle with SimaPro Software***
GEOMATICS AND ENVIRONMENTAL ENGINEERING Volume 5 Number 3 2011 Katarzyna Grzesik*, Kinga Guca** Screening Study of Life Cycle Assessment (LCA) of the Electric Kettle with SimaPro Software*** 1. Introduction
More informationTechnical and safety successes of Hungary's lignitemining operations at MÁTRA Power Plant
Technical and safety successes of Hungary's lignitemining operations at MÁTRA Power Plant Dr Joachim Witzel MÁTRAI ERŐMŰ ZRT. Mátrai Erőmű Zrt. 10.03.2011 SEITE 1 Structure 1. MÁTRA Power Plant in Hungary
More informationSECTION 16 Quadratic Equations and Applications
58 Equations and Inequalities Supply the reasons in the proofs for the theorems stated in Problems 65 and 66. 65. Theorem: The complex numbers are commutative under addition. Proof: Let a bi and c di be
More informationSection 1: How will you be tested? This section will give you information about the different types of examination papers that are available.
REVISION CHECKLIST for IGCSE Mathematics 0580 A guide for students How to use this guide This guide describes what topics and skills you need to know for your IGCSE Mathematics examination. It will help
More informationStudent Outcomes. Lesson Notes. Classwork. Exercises 1 3 (4 minutes)
Student Outcomes Students give an informal derivation of the relationship between the circumference and area of a circle. Students know the formula for the area of a circle and use it to solve problems.
More informationStrategic Mine Planning Flexible mine planning to meet changes in the business environment. SRK Consulting Engineers and Scientists
Strategic Mine Planning Flexible mine planning to meet changes in the business environment Jurgen Fuykschot SRK Consulting Minex Conference 2009 Engineers and Scientists MINE PLANNING The process to get
More informationName Geometry Exam Review #1: Constructions and Vocab
Name Geometry Exam Review #1: Constructions and Vocab Copy an angle: 1. Place your compass on A, make any arc. Label the intersections of the arc and the sides of the angle B and C. 2. Compass on A, make
More informationManual for simulation of EB processing. Software ModeRTL
1 Manual for simulation of EB processing Software ModeRTL How to get results. Software ModeRTL. Software ModeRTL consists of five thematic modules and service blocks. (See Fig.1). Analytic module is intended
More informationManoharpur Coal Block. Sl.No. Particulars
REQUEST FOR PROPOSAL ( RFP ) FOR SELECTION OF AN OWNER S MINING CONSULTANT FOR DEVELOPMENT OF COAL BLOCKS OF THE ORISSA POWER GENERATION CORPORATION LTD. 1. BACKGROUND Orissa Power Generation Corporation
More informationNEW MEXICO Grade 6 MATHEMATICS STANDARDS
PROCESS STANDARDS To help New Mexico students achieve the Content Standards enumerated below, teachers are encouraged to base instruction on the following Process Standards: Problem Solving Build new mathematical
More informationCurriculum overview for Year 1 Mathematics
Curriculum overview for Year 1 Counting forward and back from any number to 100 in ones, twos, fives and tens identifying one more and less using objects and pictures (inc number lines) using the language
More informationTwoseasonal thermal analyzes of systems with a vapor compressor heat pump and horizontal ground heat exchangers
Open Access Journal Journal of Power Technologies 94 (2) (2014) 1 9 journal homepage:papers.itc.pw.edu.pl Twoseasonal thermal analyzes of systems with a vapor compressor heat pump and horizontal ground
More informationSURFACE COAL MINING AND LAND RECLAMATION IN THE CZECH REPUBLIC
Górnictwo i Geoinżynieria Rok 31 Zeszyt 2 2007 Ivan Svoboda*, Marie Vrbova*, Vratislav Ondráček** SURFACE COAL MINING AND LAND RECLAMATION IN THE CZECH REPUBLIC Mining of industrial minerals (in particular
More informationDUBAI MONTH September 2016
DUBAI MONTH September 2016 A series of Professional Development courses for Mine Geologists, Mining Engineers and Mining Managers plus courses for others interested in understanding mining and the role
More informationDŵr y Felin Comprehensive School. Perimeter, Area and Volume Methodology Booklet
Dŵr y Felin Comprehensive School Perimeter, Area and Volume Methodology Booklet Perimeter, Area & Volume Perimeters, Area & Volume are key concepts within the Shape & Space aspect of Mathematics. Pupils
More informationOptimal site selection for heap leaching structures by the analytic hierarchy process (case study: Taft heap leaching structure, Iran)
GOSPODARKA SUROWCAMI MINERALNYMI Tom 29 2013 Zeszyt 1 DOI 10.2478/gospo20130005 SAEED SOLTANIMOHAMMADI*, MEHDI AMINI** Optimal site selection for heap leaching structures by the analytic hierarchy process
More informationFor personal use only
Korab Resources Limited Gold Operations Update November 2012 Andrej K. Karpinski Executive Chairman Korab Projects BOBRIKOVO MELROSE 1 Korab Gold Projects Other Korab Projects Robust Undervalued Gold Portfolio
More informationAutomated Mine Scheduling: What is it and will it help me?
Automated Mine Scheduling: What is it and will it help me? Introduction This article discusses the philosophies, strategies, goals and pitfalls in automating a mine schedule. The intention is to give an
More informationTHE VALUATION OF ADVANCED MINING PROJECTS & OPERATING MINES: MARKET COMPARABLE APPROACHES. Craig Roberts National Bank Financial
THE VALUATION OF ADVANCED MINING PROJECTS & OPERATING MINES: MARKET COMPARABLE APPROACHES Craig Roberts National Bank Financial ABSTRACT While various methods are available to estimate a mining project
More information